Open Wire Management – Wire Mesh Cable Tray vs. Conduit

wire mesh cable management systems

Building construction has failed to keep pace with productivity improvements found in other segments of the economy. According to the U.S. Bureau of Labor Statistics, nonfarm (manufacturing) productivity has improved 200 percent since 1964 while construction productivity has actually declined. Studies also indicate that only about one-third of the working day is physical, hands-on installation and testing. The rest is overhead activities associated with installation or nonproductive time such as breaks, cell phone use, and so forth. Whatever the causes of lost or unproductive time, electrical contractors must identify new methods that will improve productivity and remove impediments to success.

As an alternative to traditional conduit, one of the best and most innovative methods is to[……]

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4 Practical Approaches To Minimize Voltage Drop Problems

wire mesh cable tray help decrease conductor temperature4 Practical Approaches To Minimize Voltage Drop Problems (photo credit: lhcb-elec.web.cern.ch)

What NEC states for max. voltage drop?

The NEC states in an Informational Note that a maximum voltage drop of 3% for branch circuit conductors, and 5% for feeder and branch circuit conductors together, will provide reasonable efficiency of operation for general use circuits.

For sensitive electronic loads, circuits should be designed for a maximum of 1.5% voltage drop for branch circuits at full load, and 2.5% voltage drop for feeder and branch circuits combined at full load.

Four practical approaches can be used to minimize voltage drop problems:

  1. Increasing the number or size of conductors
  2. Reducing the load current on the circuit
  3. Decreasing conductor length, and
  4. Decreas[……]

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